Semiconductor light-emitting device
a technology of semiconductors and light-emitting devices, which is applied in the direction of semiconductor devices for light sources, solid-state devices, lighting and heating apparatus, etc., can solve the problems of increasing manufacturing costs, reducing efficiency, and the size of lighting fixtures, and achieves the effect of increasing the number of such optical members, low manufacturing cost, and wide range of illumination
Active Publication Date: 2015-02-19
KOITO MFG CO LTD
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- Description
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Benefits of technology
The semiconductor light-emitting device described in this patent can create a wide beam of light without needing other optical components, which makes it a cost-effective and efficient solution for creating small lighting fixtures.
Problems solved by technology
A problem of using a semiconductor light-emitting device with other optical members, however, is that each additional optical member installed in the lighting fixture adds to the size of the lighting fixture, lowers efficiency, and increases the manufacturing cost.
Method used
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[0025]A semiconductor light-emitting device 1 according to an embodiment of the present invention (hereinafter, simply “light-emitting device 1”) is described below with reference to FIG. 1A and FIG. 1B.
[0026]FIG. 1A and FIG. 1B are diagrams illustrating the light-emitting device 1 of the embodiment of the present invention, in which FIG. 1A is a cross sectional view of the light-emitting device 1, and FIG. 1B is a perspective view of the light-emitting device 1. As illustrated in FIG. 1A and FIG. 1B, the light-emitting device 1 includes a substrate 2, a semiconductor light-emitting element 3 solely provided on the substrate 2, and a molded member 4 covering the semiconductor light-emitting element 3.
[0027]The substrate 2 may be formed, for example, by using ceramic materials such as aluminum nitride, alumina, mullite, and glass ceramic, and glass epoxy resin. In the present embodiment, the substrate 2 is formed as a rectangular plate member.
[0028]The semiconductor light-emitting el...
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Abstract
A semiconductor light-emitting device has a substrate, one or more semiconductor light-emitting elements provided on the substrate, and that emit light having a peak wavelength in a 380 nm to 480 nm wavelength region, and a molded member covering the semiconductor light-emitting element, and containing a phosphor that emits visible light by being excited by the emitted light from the semiconductor light-emitting element. The molded member is formed so that index A=H / (s / n) satisfies 0.3≦A≦6, where H is the height [mm] of the molded member from the substrate, s is the square root [mm] of the contact area between the substrate and the molded member, and n is the number of the semiconductor light-emitting elements covered with the molded member.
Description
TECHNICAL FIELD[0001]The present invention relates to a semiconductor light-emitting device that includes a semiconductor light-emitting element.BACKGROUND ART[0002]A semiconductor light-emitting device for emitting white light is known that includes a blue emitting element for emitting blue light, and a binder that contains phosphors for emitting light of the green to red wavelength region by absorbing the blue light (see Patent Document 1). Such a semiconductor light-emitting device produces white light by mixing the emergent blue light from the blue emitting element with the light of the green to red wavelength region emitted by the phosphors.[0003]There has been a rapid expansion of lighting fixtures that use a light source realized by the semiconductor light-emitting device of the foregoing scheme. This comes with a growing demand for widening the illumination range of lighting fixtures that use the semiconductor light-emitting device as the light source, in addition to improvi...
Claims
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IPC IPC(8): H01L25/13H01L33/50H01L33/54H01L33/58
CPCH01L25/13H01L33/54H01L33/507H01L33/58H01L25/0753H01L33/505F21K9/00H01L2924/0002H01L2924/00
Inventor SUGIMORI, SHOGOKUBOYAMA, OSAMUDAICHO, HISAYOSHI
Owner KOITO MFG CO LTD